Gas burner



Patented July 18, 1944.

UNITED STATES PATENT OFFICE GAS BURNER Leslie R. Armstrong, Porter, Ind. Application November 28, 1940, Serial No. 367,659

2 Claims.

This invention relates to gas burners such as are used on numerous heating devices, industrial and otherwise. In'the steel industry, by way of example, gas burners have wide application on numerous heating projects, for example, reheating furnaces whereinit is 'necessarythat the object to be reheatedmust be given a uniform temperature at'ja minimum cost. Accordingly, there is employed in furnaces of this type a large number of gas burners which are calculated to effectively mix gas and air in such manner asto provide for quick and complete combustion. In order to maintain the reheating furnace at a stable temperature, it is necessary that these described employ interchangeable jets which may be replaced if desired. This is. usually the case when the fuel is changed; for example, from gas-and-air to gas-and-liquids.

I It is among the objects of the present invention to provide an inexpensive and easily in-.

stalled gas burner which will accomplish quick and complete combustion of mixed gas-and-air and one which at the same time may be quickly and easily dismantledv for the replacement of lets.

Another object is to provide a device of the class .described which embodies means for quickly and easily adjusting the air supply.

The foregoing and other objects will be apparent after referring to the drawing, in which: g

,Figure 1 is a sectional elevation of the apparatus of the present invention..-

' numeral 2 designates a cylindrical metallic tube through which the gaseous mixture is to be supplied. One end of the tube 2, whichis shown in the drawing as the left-hand end, is adapted to extend into, or communicate with, the heating unit, while the other end thereof communicates with the atmosphere and is adapted to receive of aperture'd disks l6 and It, containing air ports therefrom oxygen in sufficient quantities to sup- 4. 'port combustion.

Intermediate its ends, the metallic tube 2 carries a radial flange 3 adjacent to which the inner' diameter of the metallic tube is coniformly. constricted, as indicated at 5, from the smallest portion'of which the inner diameter of the metallic tube assumes for a substantial distance a converging onto the center line of the metallic tube 2 in the direction of travel of the gaseous mixture is a series 8f drilled apertures 8 which are screw threaded and adapted to receive interchangeable jets lll of conventional design. Preferably, these drilled apertures, 8 extend at degrees.

The end of the tube 2 which is adapted to be exposed to the atmosphere is coniformlyflared as shown at l5 and carries on its outer. end an apertured plate liover which there is mounted a correspondingly apertured plate 18 having extended therethrough a plurality of set screws l9.

As shown in Figure 4, the apertured plate I8 is provided with slotted apertures 2| for the reception of the set screws l9 which engage the apertured plate l6, whereby the outer apertured. plate l8 may be secured in adjusted position with re? spect to the inner apertured plate It to provide n for varying the quantity of air to be admitted into the end of the metallic tube 2. The diameter of the outer end of the'coniforin flare IS on the tube 2 is sufliciently larger than that [of the diameter 10f the-latter to permit the employment of a total area equal to the area of the metallic tube 2. 'I'heapertured plates l6 and I! are provided with aligned central screw threaded apertures 25 and 25 respectively for the reception of an exteriorly screw threaded tube 26 which may, if desired, be connected to a source of air under Pressure. I a

On its side facing the coniform flare IS the radial flange '3 is provided with an annular groove 29 which is adapted to receive a ring 30 carrying at its end mpst adjacent the coniform flare IS an abutment II of reduced diameter.-

Thisabutment II is interiorly'screw threaded to screw threadedly engage the periphery of anannular flange "which is spaced with respect to, but of smaller diameter than the radial flange 3 referred to hereinbefore. According to such construction and arangement,there is provided between the inner wall of the ring 30 and the outer wall of the metallic tube 2, and the radial flanges 3 and 33, a gas chamber having communication with the 'jets which screw threadedly extend through the coniformly constricted portion 5 of the metallic tube 2; At diametrically opposite points in the ring 30 there is provided a tapped aperture 35 for the attachment of a gas pipe and a screw threaded plug 38 which may be removed to permit of the cleaning .of the gas chamber formed in the manner referred to.

Referring to Figure 5,. wherein there is illustrated a permissive modification, 40 designates an integral apertured plate at the outer end of the coniformiy flared portion l5. This integral apertured plate 40 is provided with a central screw threaded aperture 42 for the reception of an exteriorly screw threaded tube 43 which may, if desired, be connected to a source of air under pressure. Disposed on the inner wall of the tube 2 and at the base of the coniformly flared portion I5 is an annular seat 44 of such size as to be contacted by the end of the exteriorly screw threaded tube 43. According to this construction, the exteriorly screw threaded tube 43 may be moved into contact with the annular seat 44 and thus cut off the supply of free air through the apertures in the integrally formed plate 40. While in this position, air under pressure'may be supplied through the exteriorly screw threaded tube 43. When it is desired that free air be supplied through the apertures in the integral plate 40, the exteriorly screw threaded tube-43 may be backed off the annular seat 44.

While I have shown and described several specific embodiments of the invention, it will be understood that I do not 'wish to be limited exactly thereto, since variousmodiflcations may;

be made without departing from the scope of my invention as defined by the following claims.

I claim:

1,. A burner structure comprising in combination a burner tube having an intake end and an outlet end, a pair of annular flanges mounted onthe burner tube, one of the said pair of flanges being positioned on the tube toward the outlet end of the burner tube, the other of the flanges being positioned on the tube towards an intake end of the burner tube, the first-mentioned flange being substantially thicker than the latter flange,

the first-mentioned flange having its outer wall extended beyond its inner wall for forming a shoulder on the said flange, and having its inner wall tapered adjacent to the burner tube to provide athickened portion-of the first-mentioned flange adjacent to the burner tube, the said lat! ter flange being threaded on its upper end, a

ring member mounted on the said flanges, the ring member being threadedly secured in place by the said threads and abutting against the extended outer wall of the first-mentioned flange while resting on the shoulder thereof, thereby completing an annular fuel chamber around the burner tube, fuel supply nozzles communicating from the fuel chamber into the burner tube through the tapered thickened portion of the first-mentioned flange, the said nozzles converging towards the outlet end of the burner tube and being threadedly mounted in the saidthickened portion of the first-mentioned flange, the said nozzles being inclined at approximately 45 to the tube and converging towards a single point on the longitudinal axis of the tube, an airinjector pipe extending through the intake end into the burner tube and being mounted in the tube.

2. A burner structure comprising. in combination, a burner tube having an intake end and an outlet end, a pair of annular flanges mounted on the burner tube, Zone of the pair of flanges being mounted on the tube towards the outlet end of the burner tube, the other of the flanges being positioned on the tube towards the intake endof the burner tube, the first-mentioned of the said flanges being substantially thicker than the latterly-mentioned flange and having its outer wall extended beyond its inner wall to form a shoulder on the said flange, and further having its inner wall sloping to the burner tube to provide a thickened portion of the said wall adjacent to the burner tube, internally threaded ports extending through the thickened portion of the wall, fuel supply nozzles removably threaded in the said ports, the nozzles extending through the ports into the burner .tube and converging towards a single point therein, the latterly-mentioned flange being threaded on its outer end,

a ring member removably secured on the threads and resting on the shoulder on the first-mentioned flange, and abutting against the extended outer wall of the first-mentioned flange, thereby completing a fuel supply chamber, a fuel intake for the chamber, a clean-out port for the chamber, and a removable closure for the clean-out port, the said fuel nozzles and air-injector pipe being adjustable relative to the interior of the. 

